WT* is this? You sure you have a legitimate copy and not a pirated or tampered one?

It's the original disc I got from MSDN and the SHA1 hash matches the one on the download page (555cd0abb0890af23c4416b6b628a64d4766d436). Now, unless somebody with a supercomputer hijacked my HTTPS connection and managed to re-create an iso with the same SHA1 hash it's supposed to be exactly what Microsoft released.